On 2023-02-14, Rich Freeman <[email protected]> wrote:
> Where are you getting this from, the system log/journal? This doesn't
> seem like a clean shutdown, so if it is a kernel PANIC I wouldn't
> expect the most critical info to be in the log (since it will stop
> syncing to protect the filesystem). The details you need probably
> will be displayed on the console briefly. You can also enable a
> network console, which will send the dmesg output continuously over
> UDP to another device. This won't be interrupted by a PANIC unless
> there is some issue with the hardware or networking stack.
If you've got a serial port[1], you could also set up serial
logging. Though using serial ports have become a bit of a lost art,
the serial console code in the kernel is pretty carefully designed to
be the last man standing when things start to die. It's possible
(though I wouldn't say probable) that a serial console will be able to
show you stuff closer to the event horizon than a network console can.
Anyway, since still I'm in the serial port business (yes, there are
still plenty of people using serial ports in industrial settings) I
had to mention it...
[1] For this purpose you want a plain old UART on the motherboard type
seial port. You'd be surprised how many motherboards still have
them. Even though they're never brought out to a DB9 connector on
the back panel, there's often an 8-pin header on the edge of the
board somewhere, so you'd need one of these:
https://www.amazon.com/C2G-27550-Adapter-Bracket-Motherboards/dp/B0002J27R8/
--
Grant
